Hoist



o. E. DOTSON June 16, 1953 HOIST 2- Sheets-Sheet 1 Filed Nov. 6, 1950 INVENTOR.

.a/vve AIDa/san.

A 7'7'a/P/VEK 0. E. DOTSON June 16,1953

HOIST 2 Sheets-Sheet 2 Filed Nov. 6, 1950 I INVENTOR. Orr/e A. fia/san. mfl/ A 770/P/VEK Patented June 16, 1953 UNITED OFFICE v I ;2 s42,26t r '7 i f InoIs'r Drrie E. Dotson, Lisbon, Ohio, assig'noi-t'o Lisbon Machine Company,- Incorporated, Lisbon bhio,

a eorp'oration'of 'Ghio Appi'i'eationivovember 6, 1950, Serial No. 2194369 This invention relates to "a hoist and more particularly to a lightweight hoist having interchangeable gears by means ofwhich "its capacity may be altered.

The principal object of the inventionis' the provision of a lightweightfhoi'st of simple construction incorporating interchangeable gears whereby the ratio between the drive "and driven "shafts thereof may be varied.

A further object of the invention is the Provision of a hoist, the drive shaft 'ofwhich'is journaled in the driven shaft and the driven shaft of 'Which is 'journale'd in the body of the hoist.

A still further object of the invention is the provision of a hoist incorporating"relatively inexpensive and easily formed 'pinion'gears for interconnectine the drive'and driven shafts of the hoist.

A still further objectof the invention is the provision of a hoist wherein the plurality of gears utilized in establishingconnection between the drive and driven shafts of the hoist "are 'relatively small and are radially "spaced with respect to the drive and driven shafts and splined "to" the same for ready removal and interchange.

The. hoist disclosed herein comprisesfa' sim'ple and efficient lightweight device which is fornied .of a relatively few parts and iscapable o'fhandling relativelyheavier 'loads' tnen'eemparabie hoists heretofore known in'the ar't. The principal differences in the hoist disclosed hereinas compared with those heretofore :known in the art comprise the use of a plurality of relatively small, inexpensive; radially positioned ge'ars which :are-splined 'to "their respective shafts' ahd thereby easily removed, "replaced or interchanged to vary theeffective ca'pacity of the hoist and/or the speed of lift of the hoist. 1

The hoist incorporates a simple and --efiicient brake construction-so that theload carried thereby may be easily "controlled both bylifting and lowering stages and the entire. device thereby forming'an efiicient tool for machinezshop's, re-

:pair garages or-other similar locations where-the use of a hoist is indicated.

With the foregoing-and other "obiectsfin-"view which will appear as the description vproceeds, the invention resides in the combination and "arrang'ement of parts and in the details io 'c'on- 'struction hereinafter described and claimed, it

Claim. (Cl. 2545-169) 'Ih'e invention is illustratedin the accompany-- mg-drawing, wherein: I

- Figure 1 is *a sideelevation of the hoist.

- Pig-urea is a vertical section taken on line 2-2:

of Figure 1.

Figure 'B is a vertical section of the hoist shown: in "Figure l-v'vith parts brokenaway and parts inv cross section.

Figure 4 is an end viewtaken on "line 4- 4 of Figure 1. 'f

7 Figure 5 is'ain enlarged-vertical section of the hoist.

of Figure 5.

Figure '7 isan end view of a modified form of "the hoist, the view comparing with Figure '2 and illustrating the use of an eirtr-a reducing gear set.

By referring' tolthe drawings and Figures 1, 2, 3, e and 5 in 'palrticular it win be seen that the hoist comprises a body member ID having an annular flange H extending outwardly from oneside' thereof "and a secondary body l ni'amher 'I 2 spaced withrespect to the body In on the other side ther' eof'and secured-thereto by'means of a plurali'ty of studs 3--l 3; Matching, horizontally aligned openings I I4 and -"l'5-are formed in the bodyineinbers 10 "and l I, respectively, and annular shoulders 46 andTF-a'r'e formed" in the "body mem ers 1 0 and T2 a'bout'tlie openings 14 and t5 havingcircumierentially spaced, oppositely disposed -abutm'ents 2 4 and 25 formed therebetween so that achain 26 "maybe positioned on the "driven shaft 20 and--moved thereby. A drive shaft 2! "is-"positioned longitudinally through the "tubular enven shaft 20, the ends of the drive shaftzTextending outwarmy of-the ends' of the "tubular driven snare-2o and an end 78' of "the. drive shaft- 2 1 'h'aving spline flformed'inwardly frointhe' end thereof for the freception'of a pinion ge'a1fl'ii0. The "outermost end '28 of the drive shaft 2"! is adapted to'be journaled in a bearing 31 positioned in an annularhoss' fl whi'ch'in turn 'is formed in acap 33 secured to the periphery of the janriular'fiange H by a plurality of cap 7 screws-+34.

-- "A pinion gear'*35 is positionedon the spline 2'1 heretofore referred to a's =be'ing' forme'd SD11 Figure 6' is avertical' section taken on lined- 6 3 one end of the tubular driven shaft 23. By referring to Figure 5 in particular it will be seen that the pinion gears 30 and 35 are positioned side-by-side in the area defined by the body member ID, the annularfiange H thereon and the cap 34 forming a closure with respect thereto. A stub shaft 36 is also positioned in the area defined by the body Hi, the annular flange l l thereon and the cap 33 secured thereto and is journaled on bearings 31 and 38, re-

spectively, the bearing 38 being positioned in an annular boss 39 formed on the inner surface slots 53 and lock the sleeve 45 to the secondary of the cap 33 while the bearing 31 is positioned in an opening 40 in the body member ID.

The stub shaft 36 has a spline formation 4| thereon and a pinion gear 42 positioned thereon and in mesh with the pinion gear 30, heretofore referred to, and the stub shaft 36 has a secondary pinion gear 43 positioned thereon and in mesh with the pinion gear 35 heretofore referred to. It will thus be seen that rotating motion imparted the drive shaft 21 will be conveyed by: way of the pinion gears 30 and 42 to the stub shaft 36 and by way of the pinion gears 43 and 35 to the driven tubular, shaft and that the chain 26 located between the flanges 22 and 23 of the driven shaft 20 will be moved thereby. V

It will occurto those skilled in the art that the pinion gears 36, 42, 43 and 35 will provide asuitable reduction between the driveshaft 21 and the driven shaft 20 so that relatively heavy loads may be lifted by the chain 26 and that at such time as it is desired to use the hoist for relatively lighter loads the pinion gears 30, and35 may be removed and replaced in reverse relation on theshafts Hand 21 and the pinion gears 42 and. 43,.likewise reversed on the stub shaft 35 whereby the ratio between the drive shaft 21 and the driven shaft 20 -is substantially changed.- It will'also occur to those skilled in the art that the use of the pinion gears 36, as, stand 35 makes possible a'relatively smaller hoist construction than has heretofore been believed possible and at a minimum of expense as the gears are capable of economical formation and rapid assembly on their respective shafts by means of the spline formation therebetween. The sameformation facilitates their ready removal or replacement ability whereby.

the capacity and/orspeed of the hoist may be varied. a

In order that motion may be imparted to the drive shaft 21, a key 44 is positioned in the shaft and a sleeve 45 is positioned thereon and secured thereto by the key 44. The sleeve 45 has an annular flange 46 on its innermost end and a large thread pattern 41 formed on its outer surface on which is located a pulley 4B. A bushing 49 positioned on the drive shaft 21 engages the pulley 48 and a nut 50 threadably engaged on the drive shaft 21 positions the bushing 49. The pulley 48 is thereby capable of moving only approximately half a revolution on the sleeve 4 5so that driving motion imparted to the pulley 48 as-by means of a' secondary chain 51 may be-imparted to the drive shaft .21.

Braking means is disclosed in Figures 5 and 6 of the drawings and comprises a plurality of rollers 52 circumferentially spaced about the sleeve 45 by a cam disc 53 having cam slots 53a formed therein. The rollers 52 are normally urged outwardly of the cam slots 53A by a plurality of springs; 54. A secondary sleeve 55 is provided with a spline pattern 56 on its one sleeve 55 thus effectively braking any movement of the pulley 48, sleeve 45 and shaft 21 with respect to the body I2. Those skilled in the art will recognize that this braking action will take place upon the relative slowing down of the pulley 48 with respect to the shaft 21 at such time as the hoist is lowering the chain 26 and that the same braking action may be obtained when the chain 26 is being elevated by reversing the motion of the pulley 48. The

pulley 48 and'the annular shoulder 58 therein serve merely to position the secondary sleeve 55 which remains stationary at all times due to its splined engagement with the secondary body l2 of the hoist. 7

It will thus be seen that the construction disclosed is' simple and efficient, capable of rapid formation and assembly and meets the several objects of the invention.

By referring now to Figure 7 of the drawings a modification in the pinion gear arrangement of the hoist such as hereinbefore disclosed may be seen and wherein a hoist body 69 is disclosed having an annular flange El and a drive shaft 62 and a driven shaft 63. Splines 64 and 65 are formed on the drive and driven shafts 62 and 53, respectively, and an idler gear 66 is rotatably mounted on the driven shaft 53. A pinion gear 61"is positioned on the drive shaft 32 by the spline 64 and is engaged with a piniongear 652 on a stub shaft 69. A pinion gear 10 on'the stub shaft 89 engages the idler gear 66 and it is also engaged by a pinion gear 1| on a stub shaft 12. A pinion gear 13 on the stub shaft 12 engages a pinion gear 14 on the driven shaft 53 and secured thereto by the spline 65. Thus a double reduction may be obtained and the capacity of the hoist increased without increasing the size or weight thereof materially.

It will thus be seen that the several objects -of the invention are met by the hoist disclosed sleeve-an annular flange on said body member and a cap secured to said flange and having a bearing positioned therein, the other end of said drive shaft journaled in said bearing, a stub shaft positioned between said cap and said body member and spaced with respect to said drive shaft, splines formed on said drive shaft and said stub shaft and pinion gears positioned on said splines, onev end of said tubular drivenshaft 5 having a spline formed thereon and a secondary pinion gear positioned thereon and engaged with one of said pinion gears on said stub shaft whereby rotating motion imparted the drive shaft by said pulley is conveyed through said pinion gears to said secondary pinion gear and to said tubular driven shaft, a cam disc on said sleeve adjacent said pulley, a secondary sleeve positioned in said pulley and engaging said body member and defining a. stationary annular chamber about saidsleeve and cam disc, a plurality of cam slots formed in the periphery of said cam disc and a plurality of rollers located one in each of said cam slots, said pulley being capable of limited rotation on said sleeve to engage said cam disc and move the same in one direction.

ORR/IE E. DOTSON.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,187,669 Spaulding June 20, 1916 2,403,462 Schroeder July 9, 1946 FOREIGN PATENTS Number Country Date 516,846 France Dec. 10, 1920 

